Answers
Explanation:
We are given: Initial temperature = 291 K
: Initial pressure = 29 atm
: Final temperature = 299 K
We use Guy-Lussac's law to find the final pressure:
\(\begin{gathered} \frac{P_1}{T_1}\text{ = }\frac{P_2}{T_2} \\ \therefore P_2\text{ = }\frac{P_1T_2}{T_1}\text{ = }\frac{29\text{ }\times\text{ 299}}{291}\text{ = 29.80 atm} \end{gathered}\)Answer:
The basketball's pressure will increase.
Related Questions
What is the zonecreated if force of separation occurs?
Answers
how many seconds are there in 15 hours show work
Answers
Answer:
54,000 seconds
Explanation:
seconds in 1 hr = 3600
secs in 15 hrs = 3600×15
→ 54000
Does MgSO4 react with ZnSO4?
Answers
There is no reaction between zinc II sulfate and magnesium sulfate.
Is there a reaction?We know that a reaction is said to occur when two species are combined and there are new products that appear in the system. This implies that if there are no new substances that appear in the system we can not say that a chemical reaction has taken place.
In this case, we can see that we can not be able to observe any change when wee mix a solution of magnesium sulfate and zinc II sulfate since the both of them have the same anion.
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How can you observe a plant giving off oxygen during photosynthesis
Answers
A plant giving off oxygen during photosynthesis comes from water .
The plants takes up the carbon dioxide and the water and in the presence of sunlight releases the oxygen as the by product in the process of the photosynthesis. in the process of the photosynthesis , the chlorophyll excited by the sunlight. in the presence of this the water undergoes the photolytic oxidation. this means that water is breaking down in to the hydrogen ion , electrons and the free oxygen. there are various experiments that shows that the source of oxygen is the water.
Thus, A plant giving off oxygen during photosynthesis comes from water .
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2. An ion is a charged particle that is formed when
a. An atom gains electrons
b. An atom loses electrons
c. Both A and B
d. None of the above
Answers
The correct answer is option c. Both A and B: An ion is a charged particle that is formed when an atom gains electrons or an atom loses electrons.
First you need to know the definition of ion. An ion is a molecule or atom that has a positive or negative electrical charge.
That is, an ion is an atom whose electric charge is not neutral. This charged particle can be positive or negative.
Ionization is the chemical or physical process by which ions are produced. In this process, negatively charged ions are produced by gaining electrons and are known as anions.
The positively charged are produced by the loss of electrons and are known as cations.
In summary, an ion is a charged particle that is formed when an atom gains electrons or an atom loses electrons, and they are known as cations and anions respectively.
The correct answer is both A and B.
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Help plz:))) I’ll mark u brainliest ASAP 10 points
What element is found in group 4 and period 5?
Answers
Answer:
answering so the person who wanted brainliest can get it :D
<3
In the reaction below what is the molar enthalpy if 1.73 mol A reacts with unlimited B and releases 4567 kJ of heat.
2 A+ 3 B - 2C
Answers
The standard enthalpy change for the reaction 2A+B⇌2C+2D is 664 kJ/mol and The heat that is absorbed when 3.70 mol of A reacts is 2456.8 J
The heat changes that take place as reactants combine to generate a product are measured by the enthalpy of a reaction.
The following formula can be used to determine the enthalpy change of a reaction:
Hess's law states that
Enthalpy of reaction = product's enthalpy - the reactant's enthalpy.
Considering the given reaction: 2A + B ⇌ 2C + 2D
Enthalpy of reaction = product's enthalpy - the reactant's enthalpy.
Enthalpy of reaction (ΔH°f) = (2 C + 2 D) - (2 * A + B)
Enthalpy of reaction (ΔH°f) = {[2(223) + 2(-523)] - [2(-245) + 2(-387)]}
Enthalpy of reaction (ΔH°f) = 664 kJ/mol
ΔH = q ÷ n
ΔH = molar enthalpy (heat) of solution
q = amount of energy (heat) released or absorbed
n = moles of solute
so. q = ΔH xn
q = ΔH xn
q = 664 kJ/mol x 3.70 mol
Q= 2456.8 J
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chemical formula of vinegar + cream of tartar
Answers
State your claim. Make sure your claim fully describes how the chemical equation Cu + 2AgNO3 → Cu(NO3)2+ 2Ag explains what happens when copper reacts with silver nitrate.
Answers
>When copper reacts with AgNO3, Cu displaces Ag from AgNO3, forming Cu(NO3)2.
>It's a displacement reaction as well as redox reaction.
A compound of P and F was analyzed as follows: heating 0.2324 g of the compound in a 378-cm3 container turned all of it to gas, which had a pressure of 97.3 mmHg at 77°C. Then the gas was mixed with calcium chloride solution, which turned all of the F to 0.2631 g of CaF2. Determine the molecular formula of the compound.
Answers
The molecular formula of the compound is determined as P₂F₄.
What is meant by molecular formula?Molecular formula tells us which atoms and how many of each type of atom are present in the molecule.
Molar mass of CaF₂ is 78.07 g/mol(0.2631 g CaF₂) × (1 mol CaF₂ / 78.07 g CaF₂) = 0.00337 mol CaF₂
2F- + Ca₂+ → CaF₂
(0.00337 mol CaF₂) × (2 mol F / 1 mol CaF₂) = 0.00674 mol F
As, Molar mass of F is 18.9984 g/mol
So, (0.00674 mol F) × (18.9984 g F / 1 mol F) = 0.12805 g F
1 mmHg = 0.00131578947 atm
(97.3 mmHg) × (0.00131578947 atm / 1 atm) = 0.128 atm
(378 cm³) × (1L / 1000 cm³) = 0.378 L
Now, T = 77 + 273 = 350 K
As, PV = nRT
n(PxFy) = PV / RT
n(PxFy) = (0.128 atm × 0.378 L) / (0.0821 L atm mol-1 K-1 × 350 K) = 0.001684 mol
n(PxFy) = 0.001684 mol
n(PxFy) = m(PxFy) / M(PxFy)
M(PxFy) = m(PxFy) / n(PxFy) = (0.2324 g) / (0.001684 mol) = 138 g/mol
m(PxFy) = m(P) + m(F)
0.2324 g = m(P) + 0.12805 g
m(P) = 0.2324 - 0.12805 = 0.10435
m(P) = 0.10435 g
Molar mass of P is 30.9737 g/mol
so, (0.10435 g P) × (1 mol P / 30.9737 g P) = 0.003369 mol P
Now, n(P) : n(F) = 0.003369 mol : 0.00674 mol = 1 : 2
Therefore, empirical formula of PxFy is PF₂
Molar mass of PF₂ 68.9705 g/mol
Molecular formula of PxFy is ( PF₂)n
n = M(PxFy) / M( PF₂) = (138) / (68.9705) = 2
Therefore, the molecular formula of PxFy is P₂F₄.
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The solubility in hexane of organic compound O is measured and found to be 0.520-that would contain 120. mg of O at this temperature.Be sure your answer has the correct unit symbol and 3 significant digits.00.0olo88at 25. °C. Calculate the volume of a saturated solution of O in hexanemLE
Answers
According to the explanation given in the previous session, now we have hexane in an organic compound with the solubility of 0.520 g/mL at 25°C. We need to find the value of volume at 120.0 mg
1 gram = 1000 mg
120.0 mg = 0.12 grams
Now we can calculate the volume:
0.520g = 1 mL
0.12g = x mL
0.520x = 0.12
x = 0.12/0.520
x = 0.231 mL is the volume for this compound
What is the density (in grams per milliliter) of the rectangular bar if it has a mass of 186.77 g and measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height
Answers
Answer:
roh = 1.6x\(10^{-3}\)
Explanation:
The density (g/mL) of a rectangular bar that has a mass of 186.77 g and measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height is 1.61g/mL.
How to calculate density?The density of a substance can be calculated by dividing the mass of the substance by its volume.
According to this question, a rectangular bar measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height.
Volume of rectangular bar = Length × width × height
= 4.26 × 1.42 × 19.21
= 116.21cm³
Density of the bar = 186.77g ÷ 116.21mL
Density of the bar = 1.61g/mL
Therefore, the density (g/mL) of a rectangular bar that has a mass of 186.77 g and measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height is 1.61g/mL.
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Describes the chemical reaction (s) that produce AMD. Equations
are balanced and formatted to show subscripts.
Pls help I’m so confused
Answers
FeS2 + 7O2 + H2O → Fe2+ + 2SO4^2- + 2H+
This reaction is an oxidation reaction, where the sulfide mineral is oxidized to sulfate ions and ferrous ions are released. The ferrous ions can then react with water and oxygen to form ferric hydroxide (Fe(OH)3), which is a yellow-orange solid that contributes to the characteristic color of AMD.
The overall reaction can be written as:
4FeS2 + 15O2 + 14H2O → 4Fe(OH)3 + 8SO4^2- + 16H+
This reaction shows that four molecules of pyrite react with 15 molecules of oxygen and 14 molecules of water to produce four molecules of ferric hydroxide, eight molecules of sulfate ions, and 16 molecules of hydrogen ions. The reaction is balanced to ensure that the number of atoms of each element is the same on both sides of the equation.
Help with science ASAP!! Will give brainliest!! :)
Answers
B
Explanation:
20.0g+25.0g+30.0g=75.0g
75.0g/3=25.0g
The diagram below represents the organizational levels of living things.
organisms
organ systems
?
tissues
cells
Which of the following examples represents the missing organizational level?
A blood
B heart
C plasma
D vein
Answers
Answer: its vein
Explanation:
Answer: It’s blood
Explanation:
I did the quiz
Please help, really need this turned in!
While working in the chemistry lab, you dissolve 2.5g of sodium hydroxide chips into a beaker containing 50mL of water. As you pick up the beaker to add it to a separate solution, you notice the outside of the beaker is very cold. What explains this decrease in temperature?
Question 45 options:
Energy was absorbed when the bonds between sodium and hydroxide ions were broken
Energy was gained when the sodium and hydroxide ions formed new bonds with the water.
Energy was released when the sodium and hydroxide ions came together to form NaOH.
Energy was released when the bonds between sodium and hydroxide ions were broken.
Answers
Answer:
Energy was gained when the sodium and hydroxide ions formed new bonds with the water.
Explanation:
The other answer choices are incorrect because:
Energy was absorbed when the bonds between sodium and hydroxide ions were broken: This is incorrect because breaking bonds requires energy, so energy is absorbed rather than released.
Energy was released when the sodium and hydroxide ions came together to form NaOH: This is incorrect because the reaction being described is dissolution of NaOH in water, not formation of NaOH from its constituent ions.
Energy was released when the bonds between sodium and hydroxide ions were broken: This is incorrect for the same reason as the first option. Breaking bonds requires energy, so energy is absorbed rather than released.
Answer: this correct answer will be energy was released when the sodium and hydroxide ions formed new bonds with the water.
Explanation:
Strontium hydroxide reacts with hydrobromic acid to produce Strontium bromide and
water.
Write and balance the chemical reaction above, use it for problems 1-4 below:
1. If 5.50 moles of strontium hydroxide were consumed, how much moles of water are
produced?
2. Find the mass of hydrobromic acid used to produce 7.50 moles water.
3. If 10.8 g of strontium hydroxide were used, how much moles of strontium bromide are
produced?
4. If 13.3 g of hydrobromic acid were consumed, find the mass of the water produced.
Answers
Sr(OH)2 + 2 HCl --> SrCl2 + 2 H2O
To find the moles of water produced when 5.50 moles of strontium hydroxide are consumed, we need to apply the law of conservation of mass. The mass of water produced is equal to the mass of strontium hydroxide consumed. Since strontium hydroxide has a molar mass of 142 g/mol and water has a molar mass of 18 g/mol, 1 mol of strontium hydroxide can produce 9 mol of water. Therefore, 5.50 moles of strontium hydroxide can produce 49.5 mol of water.
Similarly, 7.50 moles of water can be produced by reacting 18 moles of hydrobromic acid with strontium hydroxide. Hydrobromic acid has a molar mass of 79.9 g/mol, so 18 moles of hydrobromic acid would have a mass of 79.9 * 18 = 1435.2 g.
To find the moles of strontium bromide produced when 10.8 g of strontium hydroxide is used, we need to apply the law of conservation of mass again. The mass of the strontium bromide produced is equal to the mass of strontium hydroxide consumed. Since strontium bromide has a molar mass of 410 g/mol and strontium hydroxide has a molar mass of 142 g/mol, 1 mol of strontium bromide can consume 3.23 moles of strontium hydroxide. Therefore, 10.8 g of strontium hydroxide can produce 10.8 / 3.23 = 3.34 moles of strontium bromide.
Finally, to find the mass of water produced when 13.3 g of hydrobromic acid is consumed, we need to apply the law of conservation of mass yet again. The mass of the water produced is equal to the mass of hydrobromic acid consumed. Since hydrobromic acid has a molar mass of 79.9 g/mol, 13.3 g of hydrobromic acid would produce 13.3 / 79.9 = 0.166 moles of water.
what is the molar mass of a gas whose density is 3.55 g ⋅ l 1 at 110 c and a pressure of 736 torr?
Answers
115.25g/mol
Explanations:According to the ideal gas equation:
\(PV=nRT\)where
• P is the ,pressure (,in atm)
,• V is the ,volume ,in litres
,• n is the ,number of moles
,• R is the ,Gas constant
,• T is the ,temperatur,e in kelvin
Recall that:
\(\begin{gathered} moles=\frac{mass}{molar\text{ mass}} \\ n=\frac{m}{M} \end{gathered}\)Substitute into the ideal equation to have:
\(\begin{gathered} PV=\frac{m}{M}\cdot RT \\ PM=\frac{m}{V}\cdot RT \\ Since\text{ }\rho=\frac{m}{V},hence; \\ PM=\rho RT \end{gathered}\)The expression for calculating the molar mass will be:
\(M=\frac{\rho RT}{P}\)Given the following parameters
\(\begin{gathered} density\text{ }\rho=3.55gL^{-1} \\ R=\frac{0.08205Latm}{molK} \\ T=110^0C+273=383K \\ P=736torr=0.968atm \end{gathered}\)Substitute the given parameters into the formula
\(\begin{gathered} M=\frac{3.55\times0.08205\times383}{0.968} \\ M=\frac{111.559}{0.968} \\ M=115.25gmol^{-1} \end{gathered}\)Hence the molar mass of the gas will be approximately 115.25g/mol
2. What causes a current in an electric circuit?
conductor
voltage
ampere
electric charge
Answers
Answer:
electric charge
Explanation:
HELPPP PLEASEEEEE!!!!!!!
Answers
The evidence in figure 2 and table 1 which describes the changes in the rock after a year is the presence of a round edge.
What is Weathering?This is referred to as the breaking down or dissolving of rocks and minerals on Earths surface through elements such as wind, water etc.
In the diagram given, the rock previously had a sharp edge but as time went on there was breakdown of the edges which resulted in it becoming round and is therefore the evidence that weathering most likely occurred in the rock.
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the length of a soccer field; 120. m (three significant figures), to inches
given the following equivalences:
1 in 2.54 cm
=
1 ft = 12 in
Answers
When we convert 120 meter to feet we obtain 393.6 feet.
How do you convert from meter to feet?Unit conversions is very important in science. It is important that we are able to express a value in different units as this is able to ease the process of making calculations.
We know that;
1 meter = 3.28 foot
120 meter = 120 meter * 3.28 foot/1 meter
= 393.6 feet
Thus, when we convert 120 meter to feet we obtain 393.6 feet.
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6. How many moles are in 8.30 x 1023 molecules of CO₂?
a.
b.
C.
d.
1.37
2.8
55.5
100
Answers
what is the boiling pressure in a mixture? how is this boiling pressure generated for the mixture? explain with the figure.
Answers
When the combined vapour pressure of a miscible liquid mixture reaches atmospheric pressure, the solution boils. This vapour pressure denotes the boiling pressure in a mixture.
What causes boiling under pressure?The air pressure directly impacts a liquid's boiling point. The weight of the air molecules above the liquid is the factor putting more pressure on the liquid. This is considered to as atmospheric pressure in an open system. The higher the boiling point and the more energy needed to bring liquids to a boil, the higher the pressure.
What is the combination distillation boiling point?Because volatile compounds regularly have different boiling points, when a mixture is distilled, the components commonly separate from the mixture. The temperature at which the external pressure operating on the surface of a liquid equals the vapour pressure of the liquid phase of a compound is termed as the boiling point.
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422000 scientific notation form:
Answers
Why do all elements have their own unique color? Please explain.
Answers
All the element have their own unique color because the every element have their own set of energy levels.
According to the bohr model of atoms : electrons exist at certain energy levels. when we give heat to electron , it gets excited and moves from lower energy level to higher energy level. the electron is less stable in higher energy level. when an electron returns from higher energy level to lower energy level it emits some energy in form of radiation. The wavelength of light depends upon energy level . and every elements have their own unique energy levels. The color for different element is different.
Thus, All the element have their own unique color because the every element have their own set of energy levels.
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Which statement explains why NaBr is classified as a compound?
1.
Na and Br are chemically combined in a fixed proportion.
2.
Na and Br are both nonmetals.
3
NaBr is a solid
298 Kand standard pressure.
4.
NaBr dissolves in H20 at 298 K.
Submit
Hide Toolbar
Answers
Answer:1
Explanation:i know cuz I got it right
NaBr is classified as a compound because sodium and bromine are chemically combined in a fixed proportion.
Explanation:
Element is defined as the simplest form of a substance that cannot be divided further by any physical means.For example oxygen (\(O_2\)), coal (carbon) etc.A compound is defined as the form of a substance in which two or more different elements are chemically combined together in a fixed proportion.For example sodium chloride (NaCl), nitric acid (\(HNO_3\))A compound can be further divided into a simple substance.So, from this, we can conclude that NaBr is classified as a compound because sodium and bromine are chemically combined in a fixed proportion.
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A graduated cylinder contains 4.50 mL of water. After a piece of zinc is dropped into the cylinder, the water level rises to 9.24 mL. What is the volume of the piece of zinc?
Answers
Answer: Well, the volume of the copper is (63.4 - 40.0) * mL = 23.4 * mL
Explanation:
Do you agree? The copper displaces the given volume of water.
Now ρ Cu = 8.90 ⋅ g ⋅ c m 3 OR ρ Cu = 8.90 ⋅ g ⋅ m L − 1, i.e. 1 ⋅ m L ≡ 1 ⋅ c m 3
But by definition, ρ density = mass volume
And thus mass = ρ × volume = 8.90 ⋅ g ⋅ m L − 1 × 23.4 ⋅ m L
= 208.3 * G
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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Concentrated hydrochloric acid is approximately 12.2 M. If a student needs to prepare 250. mL of 0.500 M hydrochloric acid, what volume (mL) of concentrated acid is needed?
Answers
Would it be 10.2 mL? I used the formula M1V1=M2V2
Explanation:
I think the person that asked it correct
A 50.0 g sample of an unknown
compound contains 14.19 g Na,
19.76 g O, and 16.05 g Cr. What is
the percent composition of Cr in the
compound?
[? ]%